Die



(I. HOPKINS Sept. 27, 1932.

DIE

2 Sheets-Sheet 1 Filed NOV. 20, 1929 INVENTOR. CHARLES HOPKINS ATTORNEY.

2 Sheets$heet 2 Sept. 27, 1932. c. HOPKINS DIE Filed Nov, 20, 1929 RK Y7 mP E \w ow NO W m 11 m IGP-x C m mm l@ i: MN I! :5: Z Q

Patented Sept. 27, 1932 UNITED STATES IPA'TEN TLQ I ER CHARLES HOPKINS,or Por'rsrowiv, rnnnsynvnnra DIE Application. filed November 20, 1929.Serial 1N0. 408,490.

for use in punching hot press nuts which in addition to the usual borefor the thread have a circumferential recess or shoulder such as I theline44c of F1gure3;

shown at in Figure 14 and one or more slots, such as 32 in Figure l l,leading from the outer surfaces of said nuts to the saidshoulder orcircumferential recess 30. p

I achieve my object by using in combina- 15 tion a punch, a die carryingslotting ele ments, a piercer having a recess forming element thereonand a crowner having slots therein.

The dies herein disclosed are adapted foruse, in the well known hotpress nut punching machines now 011 the market and for that reason onlythe dies will be here described.

More particularly stated one of the objects of this invention is toproduce a die for 23 -;the stamping out of articles of manufacturehaving recesses or shoulders, slots leading into said recesses and boresor holes.

Another object of this invention is to produce adie for use in'punchinghot press nuts o which in addition to the usual bore for the thread havea circumfer ntial recess or shoulder and one or more slots leading intosaid shoulderfrom' the outer surface of said nuts. Another object ofthis invention is to pro .jdi10e dies for the particular purpose setforth which shall be simple in construction, easy "to assemble andcomparatively cheap to produce. V V

These and other objects and advantages of .1this invention will beclearly seen from the following description and the drawings which forma part hereof. I

In the drawings Figure 1 is a view in section of the die elementsassembled, the maichine parts to whichthev individual ele.-- ments areattached being omitted; 'As shown one of the positions assumed by thecomponent dies in theprocess of manufacture of In a nut is shown infuil'lines and another posiftion is shown-1n dotted lines; y

' Figurell is afragmentary disclosed.

Figure 2'isa front view ofthe dies carrying the slotting elements and acompleted nut lodgedfin said die part of said view being shown insection along the line 22 of Figure 3. c. V -s Figure 3 is-a top view ofthe assemblyof dies carrylng the slotting elements and'a completed nutlodged in said dies. 7, 1 Figure 4 is: an enlarged sectional .view'on.

Figure 5 'is a front view of the crowner.

Figure 6 is a fragmentary top view of V crowner showing the'slotted end.

Figure is a section taken along the line 7 7 of Figure 5 showing thefragment of the crowner shown in Figure 6. v Figure Sis a front view ofthe punch. I 4 figure 9 is a perspective showing a punch for squarenuts. i I a Figure 10 is a front view of a piercer show-inga shoulder.adapted for punching,v a

tapered circumferentialrecess such as shown at 36 in Figure 13. I

side view ofthe piercer shown in Figure 10.

Figure 1-2 is a perspective View ofa two disclosed.

- slot hexagon nut, a product of the dies herein Figure 13, isapersipective view-of a three slot hexagon nut having a; taperedcircumferential groove a product of thedies herein Figure. 14 is aperspective view of 'atwo slot square nut disclosed, v

. Referring moreparticularly to the drawassembly of the slotting elementcarrying dies 2, the punch 3, the piercer i and crowner 5 in operativeposition and in the process aprodnct ofthe dies herein I ings-whereinsimilar reference designate sim ilar parts, reference numeral 1 denotes.the

designated by letters A. B C'QD'. .The,

piercer 4: issh'owninone position by the solid" lines designated byletters J K L M andjin; another p sition by: the dotted lines desigatedby letters J K The crowner 5. c

Sai

. in a cylindrical 7 an aperture. adapting is shown in one position bythe solid lines designated by letters E F G H and in another position bythe dotted lines designated by letters E F G H.

The slotting element carrying dies are composed of an upper member 6 anda lower member 7 The members 6. and 7 have holes 8 and 9 formed thereinof such shape that together they bound and form a hexagon shapedaperture. The upper and lower elements each have a slot 10 formedtherein in member, one end of which is free and punches out the nutwhile the other end is firmly held by a machine element here not shown.The.

punching face 17 of the punch 3 ishexagon shaped adapting same to punchhexagon nuts. A hole 18 is bored through theentire length of the punch 3whereby metal which is punched out by the piercer can be eliminated fromthe machine.

The piercer 4 is made of a cylindrical main body portion 21,}threaded atone end 22 for insertion into and engagement by the machine element (notshown) which is-to carry'and actuate the same. The free end terminatesboring element 19 of smaller diameter'than the main body portion 21. Ashoulder 20 is formed at the point of junction of the elements 19 and21.

The crowner 5 is a hollow cylinder having it for mounting and movementon the main body member 21 of the piercer 4. The crowner 5 consists of a7 main body member 23 threaded atone end 24 for insertion into andengagement by the machine element (not shown) which is to carry andactuate the same. The face of the free end of the mainbody member 23terminates in a crowning surface 28 properly shaped to impress the crownsurface on the nuts; The main body member 23 is hexagon shaped incross-section having a plurality of bounding surfaces 27. Slots 26 areformed in the members 27 at points where they will register with andreceive the cutter 12. The slots are of sufficient length to permit thenecessary movement of the crowner.

Although the method of operation and uses .of theelements here outlinedare believed to be obvious,nevertheless for the purpose .of obviatingany possibility of misunderstanding the following detaileddescription-is here given.

- The slotting element dies (land 7 are insertii ed in the nut punchingmachine: The punch 7 er 3, the piercer 4 and crowner 5 are. also mountedin place, the relative position of all of these elements with respect tothe dies 6 and 7 and each other being shown by the dotted lines inFigure 1. Metal is now fed in on the punch side of the dies 6 and 7. Thepunch 7 ismoved forward by the machine element which carries it, punchesa hexagonal piece of metal into the opening 8-9 of the dies 6 and 7 andfinally assumes the position A B C 1) shown by the solid lines in FigureAs the metal is forced into the opening 3- 9 it comes into contact withthe cutters 11 which punch the slots 32 in the metal. In the nextoperation the piercer is moved forward by machine element which carriesit finally assuming the posltion shown by the solid lines J K L M, Theportion 19 of the piercer I punches the hole 31 in the nut. The piercerenters the nut a sufficient distance to permit the shoulder 20 to formthecircumferential groove 30 of proper depth. d The metal punched out bythe piercer 4 enters the aperture 18 in the punch 3, each succeedingpiece of metal pushing forward that which preceded it, the punchedpieces being finally discharged'from the far end of the punch 3. In thenext operation the crowner is moved forward by the machine element whichcar ies it and finally assumes the position shown by the solid lines E FG H. In this position the slots 26 receive the free ends of the cutters12 and the crowning surface 28 crowns the surface of the nut. 'In thenext operation the punch is moved back by'the machine element whichcarriesit to itsoriginal position shown by the dotted lines A B C D. Atthe same time the crowner 5is moved forwarda distance sufiicient to pushthe nut out of the aperture whence it falls into a container. The slots26 permit the movement of the crowner 5with respect to the cutters 12.The crowner now moves backshape of the apertures Sand 9, the crowner 5and the punch 3, is changed to conform with the geometric shape desiredfor the nut. Figure 9 shows a punch 37 having a square face 38 and bore39 adapted for punehingsquare nuts: Instead of making'anut with twoslots one, three or any number of slots desired may be made. This isdone by merely removing or inserting the number ofcutters necessary andcutting the necessary cooperating slots in the crowner. three slotstherein is shown in Figure 13.

A hexagon nut 34 having Instead of forming a circumferential groovepurely circular in form as shown in Figures 12 and 14, a groove taperingonly in the plane perpendicular to the axis of the nut may be formed.Such tapered circumferential groove is shown in Figure 13. It is to benoted that the floor 35 of the circumferential groove is always in aplane perpendicular to the axis of the nut and does not taper upward.

The elements of the wall 36 of the circumferential grooves are parallelto the axis of the nut. The elements of the walls in the plane at rightangles to the axis of the-nut such as 40 and all parallel planes beneathit taper as shown. To produce such circumferential groove the contour ofthe shoulder 20 must be modified to the shape of the taper required asshown at 41 in Figures 10 and 11.

The above changes are only some of the many which may be made withoutdeparting from the spirit of my invention. All such' changes I view asfalling within my invention and disclosure.

Having described my invention what I claim as new and useful is As anarticle of manufacture a forming die, for use in combination with apunch and crowner for producing a nut having a bore, a circumferentialgroove and one or more slots leading into the said groove, consisting ofa body member having an aperture formed therein to produce the nut crosssection desired, one or more cutter receiving slots formed in the saiddie, and a cutter for cutting the said nut slots detachably mounted ineach of the said cutter receiving slots and positioned so that itscutting edge projects into the said aperture.

In testimony whereof I hereby aflix my signature. I

CHARLES HOPKINS.

